The impact of online therapeutic feedback on outcome measures in Internet-CBTI for adolescents with insomnia.

Background: Guided Internet cognitive behavioral therapy for insomnia (CBTI) offers an effective treatment for adolescents, but little is known about the active ingredients of therapeutic feedback on outcomes.

Objective: This study aims to identify which factors can be distinguished in written therapeutic feedback in Internet CBTI, and examine whether these factors and participation in a chat session contribute to sleep outcomes.

Methods: Internet CBTI was applied to 57 adolescents (mean age 15.